Fix UserInfo component

Author: nyamsprod

CHANGELOG.md

@@ -48,6 +48,7 @@ All Notable changes to `League\Uri\Interfaces` will be documented in this file
 
 - `UriString::parse` will fail if the URI contains whitespace.
 - `UriString::buildUri` allows the `$path` argument to be `null`.
+- `UriString::buildAuthority` allows the `$user` argument to be `null` and still generate a user info component.
 
 ### Deprecated
 

UriString.php

@@ -266,18 +266,19 @@ public static function buildAuthority(array $components): ?string
             return null;
         }
 
-        $authority = $components['host'];
-        if (isset($components['port'])) {
-            $authority .= ':'.$components['port'];
+        $userInfo = $components['user'] ?? null;
+        if (isset($components['pass'])) {
+            $userInfo .= ':'.$components['pass'];
         }
 
-        if (!isset($components['user'])) {
-            return $authority;
+        $authority = '';
+        if (isset($userInfo)) {
+            $authority .= $userInfo.'@';
         }
 
-        $userInfo = self::buildUserInfo($components);
-        if (null !== $userInfo) {
-            return $userInfo.'@'.$authority;
+        $authority .= $components['host'];
+        if (isset($components['port'])) {
+            $authority .= ':'.$components['port'];
         }
 
         return $authority;